Pitman.



JAMES T. KILBY, or DANvILLE, VIRGINIA.

prrr/IAN.

Specification of Letters Patent.

Patented sept. 2o, 1910.

Application led January 20, 1910. Serial No. 539,094.

To all whom it 'may concern:

Be it known that I, JAMES T. KILBY, a

specification.

This invention has relation to pitmen par- I ticularly designed to beused upon sewing machines and it consists lin the novel construction andarrangement of parts as hereinafter shown and described.

The object of the invention is to provide a simple structure in the formof a pitman which may be conveniently used by hand for rotating thedriving wheel of the machine or which may be connected with the crank ofthe driving wheel and the foot treadle as desired.

In order that the pitman may be readily adjusted to machines ofdifferent sizes and makes it is longitudinally extensible and securingdevices are provided for holding the adjustable parts of the pitman indesired position.

In the accompanying drawing Figure 1 is a sectional view through thebase and table of a sewing machine showing the pitman in elevation, saidpitman being in full lines in position to be actuated by hand and indotted lines connected 4with the treadle. Fig. 2 is an edge elevation ofthe pitman. Fig. 3 is a perspective view of a clamping bolt, nut andwasher used upon the pitman.

The pitman consists of a member 1 having at one end a downturned handle2 and provided in its upper edge and in the vicinity of the said handle2 with a half bearing 3. Perforations 4 extend through the member 1 atopposite sides of the half bearing 3 and are adapted to receive the legsof a staple 5. The intermediate portion of the said staple together withthe half bearing 3 forms a complete bearing which may be applied to thewrist pin 6 of the drive wheel 7 of the sewing machine or to a similarpin (not shown) mounted upon the treadle 8. Nuts 9 are screw threadedupon the ends of the legs of the staple 5 and serve as means foradjusting the intermediate portion of the said staple with relation tothe half bear- Ing 3.

The inner portion of the member 1 is cut away at one side as at 10 andthe said member is provided with an elongated slot 11. One end of achain 12 is connected with the upper edge of the member l and may beattached to the table 13 of the .sewing machine. A member 14 is providedin the vicinity of one end and upon its lower edge with half bearings 15of different sizes, said bearings 15 having perforations 16 located attheir opposite sides and the said perforations being adapted to receivethe legs of a staple 17. Nuts 18 are screw threaded upon the ends of thestaple 17 and the said staple 17 coperates with the half bearing 15 in asimilar manner as has been described with relation to the staple 5 andthe'half bearing 3. The inner portion of the member 14 is provided withan elongated slot 19 and the inner portion o f the said member 14 is cutaway at 'one side as at 20 and the cut away portion of the members 1 and14 are adapted to bear against each other and when together the sumtotal of their transverse breadth is equal to the transverse breadth ofthe end portions of the members 1 and 14 respectively. A pin 21 is fixedto the end of the member 14 and projects beyond the ends thereof and ascrew 22 is pivotally attached at one end to the said pin. A clamp nut23 is screw threaded upon the said screw and the screw is provided at apoint in the vicinity of its pivot end with a shoulder 24. The saidscrew may be projected through openings provided in the treadle 8 and bytightening the nut 23 against the lower side of the treadle the saidtreadle may be clamped between the said nut and the shoulder 24. Thusshould the treadle be devoid of a pivot end the openings in theornamentation thereof may be utilized as a means for connecting thepitman with the same. Also by such provision the pitman may be connectedwith the front or rear portion of the treadle as desired.

Clamp bolts 25 are provided with relatively large and flat heads 26 andthe portions 27 and are adapted 'to fit snugly in the slots 11 and 19 ofthe members 1 and 14. The

end portions of the said bolts 25 are threaded as at 28 and washers 29are adapted to it over the threaded portions of the asaid bolts andclamp nuts 30 are adapted to engage the threaded portion 28 of the saldbolts. The slots 11 and 19 are not in longi- I may the pitman from onehalf bearing at one end thereof t a half bearing at the other endthereof, and such a strain is not in alin'ement With or parallel to theslots 11 and 19, and consequently the members l and ltinay be held inadjusted position With a slight clamping pressure upon the slottedport-lons of the members between the heads of the bolts and the clamnuts 30. Consequently the members pbe readily adjusted Without the useof tools and When adjusted Will maintain relation. By this arrangementit Will be seen that a simple pitm'an structure is effected which isperceptible of various adjustments to meet the dierent conditions andconveniences and' which When so adjusted the parts thereof arepositively held in desired relation.

Having described the invention What I elongated slots, securing devicespassing" through the slots of the members, one member having at itsupper edge in the vicinity of its end a bearing said member having adownturned handle projecting beyond the edge of the inner portionopposite the edge having said bearing, the other member having at itslower edge in the vicinity of'its outer end a bearing, saidV bearingsbeing out of longitudinal alinement with the slots.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in the presence of tWo Witnesses.

. JAMES T. KILBY.v

lVitnesses:

WM. C. IJoNHoFr, G. E. SCROGHAM.

